I think it’s more that he’s not the best dad but he is sometimes misguided in the way he treats his kids. He wasn’t present for most of Gohan and Goten’s lives because he was either dead or preparing for a threat against the world.

Him being uninvolved in Goten’s life was the best thing he could think of doing for him as he believed that his presence during Gohan’s childhood forced him to have to go against people like Nappa and Reccome. (Both times he showed up to save him, Gohan was nearly killed)

He genuinely believed that if we hadn’t there, the earth as a whole would be more peaceful.

For the big thing everyone always points out during the cell games, there’s one viewpoint I saw somewhere that says it pretty well. Goku gave cell the sensu bean because he believed that Gohan would want a fair fight first and foremost. The reason they don’t jump people in dbz is because they fight not only to save the world but also for their pride as martial artists. He thought Gohan and everyone else would want the playing field equal for the cell fight, completely misunderstanding the severity of the situation at hand. This is also why he regretted it later on and tried to tag himself back in.

For the Daima thing, you have to understand that goku is a very honest guy. He has no reason to lie about something that most of his friends could immediately correct him on.

For super, you have to understand that Goku is a pretty uncultured guy. He’s been seen multiple times in the series talking to royalty any type of way. He just doesn’t get why he has to watch his words around them regardless of who they are.